1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.launcher2;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.content.res.TypedArray;
22import android.graphics.Bitmap;
23import android.graphics.Canvas;
24import android.graphics.Paint;
25import android.graphics.PorterDuff;
26import android.graphics.PorterDuffXfermode;
27import android.graphics.Rect;
28import android.graphics.drawable.Drawable;
29import android.util.AttributeSet;
30import android.util.DisplayMetrics;
31import android.view.FocusFinder;
32import android.view.MotionEvent;
33import android.view.View;
34import android.widget.FrameLayout;
35
36import com.android.launcher.R;
37
38public class Cling extends FrameLayout {
39
40    static final String WORKSPACE_CLING_DISMISSED_KEY = "cling.workspace.dismissed";
41    static final String ALLAPPS_CLING_DISMISSED_KEY = "cling.allapps.dismissed";
42    static final String FOLDER_CLING_DISMISSED_KEY = "cling.folder.dismissed";
43
44    private static String WORKSPACE_PORTRAIT = "workspace_portrait";
45    private static String WORKSPACE_LANDSCAPE = "workspace_landscape";
46    private static String WORKSPACE_LARGE = "workspace_large";
47    private static String WORKSPACE_CUSTOM = "workspace_custom";
48
49    private static String ALLAPPS_PORTRAIT = "all_apps_portrait";
50    private static String ALLAPPS_LANDSCAPE = "all_apps_landscape";
51    private static String ALLAPPS_LARGE = "all_apps_large";
52
53    private static String FOLDER_PORTRAIT = "folder_portrait";
54    private static String FOLDER_LANDSCAPE = "folder_landscape";
55    private static String FOLDER_LARGE = "folder_large";
56
57    private Launcher mLauncher;
58    private boolean mIsInitialized;
59    private String mDrawIdentifier;
60    private Drawable mBackground;
61    private Drawable mPunchThroughGraphic;
62    private Drawable mHandTouchGraphic;
63    private int mPunchThroughGraphicCenterRadius;
64    private int mAppIconSize;
65    private int mButtonBarHeight;
66    private float mRevealRadius;
67    private int[] mPositionData;
68
69    private Paint mErasePaint;
70
71    public Cling(Context context) {
72        this(context, null, 0);
73    }
74
75    public Cling(Context context, AttributeSet attrs) {
76        this(context, attrs, 0);
77    }
78
79    public Cling(Context context, AttributeSet attrs, int defStyle) {
80        super(context, attrs, defStyle);
81
82        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Cling, defStyle, 0);
83        mDrawIdentifier = a.getString(R.styleable.Cling_drawIdentifier);
84        a.recycle();
85
86        setClickable(true);
87    }
88
89    void init(Launcher l, int[] positionData) {
90        if (!mIsInitialized) {
91            mLauncher = l;
92            mPositionData = positionData;
93
94            Resources r = getContext().getResources();
95
96            mPunchThroughGraphic = r.getDrawable(R.drawable.cling);
97            mPunchThroughGraphicCenterRadius =
98                r.getDimensionPixelSize(R.dimen.clingPunchThroughGraphicCenterRadius);
99            mAppIconSize = r.getDimensionPixelSize(R.dimen.app_icon_size);
100            mRevealRadius = r.getDimensionPixelSize(R.dimen.reveal_radius) * 1f;
101            mButtonBarHeight = r.getDimensionPixelSize(R.dimen.button_bar_height);
102
103            mErasePaint = new Paint();
104            mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY));
105            mErasePaint.setColor(0xFFFFFF);
106            mErasePaint.setAlpha(0);
107
108            mIsInitialized = true;
109        }
110    }
111
112    void cleanup() {
113        mBackground = null;
114        mPunchThroughGraphic = null;
115        mHandTouchGraphic = null;
116        mIsInitialized = false;
117    }
118
119    public String getDrawIdentifier() {
120        return mDrawIdentifier;
121    }
122
123    private int[] getPunchThroughPositions() {
124        if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT)) {
125            return new int[]{getMeasuredWidth() / 2, getMeasuredHeight() - (mButtonBarHeight / 2)};
126        } else if (mDrawIdentifier.equals(WORKSPACE_LANDSCAPE)) {
127            return new int[]{getMeasuredWidth() - (mButtonBarHeight / 2), getMeasuredHeight() / 2};
128        } else if (mDrawIdentifier.equals(WORKSPACE_LARGE)) {
129            final float scale = LauncherApplication.getScreenDensity();
130            final int cornerXOffset = (int) (scale * 15);
131            final int cornerYOffset = (int) (scale * 10);
132            return new int[]{getMeasuredWidth() - cornerXOffset, cornerYOffset};
133        } else if (mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
134                   mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
135                   mDrawIdentifier.equals(ALLAPPS_LARGE)) {
136            return mPositionData;
137        }
138        return new int[]{-1, -1};
139    }
140
141    @Override
142    public View focusSearch(int direction) {
143        return this.focusSearch(this, direction);
144    }
145
146    @Override
147    public View focusSearch(View focused, int direction) {
148        return FocusFinder.getInstance().findNextFocus(this, focused, direction);
149    }
150
151    @Override
152    public boolean onHoverEvent(MotionEvent event) {
153        return (mDrawIdentifier.equals(WORKSPACE_PORTRAIT)
154                || mDrawIdentifier.equals(WORKSPACE_LANDSCAPE)
155                || mDrawIdentifier.equals(WORKSPACE_LARGE)
156                || mDrawIdentifier.equals(ALLAPPS_PORTRAIT)
157                || mDrawIdentifier.equals(ALLAPPS_LANDSCAPE)
158                || mDrawIdentifier.equals(ALLAPPS_LARGE)
159                || mDrawIdentifier.equals(WORKSPACE_CUSTOM));
160    }
161
162    @Override
163    public boolean onTouchEvent(android.view.MotionEvent event) {
164        if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT) ||
165            mDrawIdentifier.equals(WORKSPACE_LANDSCAPE) ||
166            mDrawIdentifier.equals(WORKSPACE_LARGE) ||
167            mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
168            mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
169            mDrawIdentifier.equals(ALLAPPS_LARGE)) {
170
171            int[] positions = getPunchThroughPositions();
172            for (int i = 0; i < positions.length; i += 2) {
173                double diff = Math.sqrt(Math.pow(event.getX() - positions[i], 2) +
174                        Math.pow(event.getY() - positions[i + 1], 2));
175                if (diff < mRevealRadius) {
176                    return false;
177                }
178            }
179        } else if (mDrawIdentifier.equals(FOLDER_PORTRAIT) ||
180                   mDrawIdentifier.equals(FOLDER_LANDSCAPE) ||
181                   mDrawIdentifier.equals(FOLDER_LARGE)) {
182            Folder f = mLauncher.getWorkspace().getOpenFolder();
183            if (f != null) {
184                Rect r = new Rect();
185                f.getHitRect(r);
186                if (r.contains((int) event.getX(), (int) event.getY())) {
187                    return false;
188                }
189            }
190        }
191        return true;
192    };
193
194    @Override
195    protected void dispatchDraw(Canvas canvas) {
196        if (mIsInitialized) {
197            DisplayMetrics metrics = new DisplayMetrics();
198            mLauncher.getWindowManager().getDefaultDisplay().getMetrics(metrics);
199
200            // Initialize the draw buffer (to allow punching through)
201            Bitmap b = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(),
202                    Bitmap.Config.ARGB_8888);
203            Canvas c = new Canvas(b);
204
205            // Draw the background
206            if (mBackground == null) {
207                if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT) ||
208                        mDrawIdentifier.equals(WORKSPACE_LANDSCAPE) ||
209                        mDrawIdentifier.equals(WORKSPACE_LARGE)) {
210                    mBackground = getResources().getDrawable(R.drawable.bg_cling1);
211                } else if (mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
212                        mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
213                        mDrawIdentifier.equals(ALLAPPS_LARGE)) {
214                    mBackground = getResources().getDrawable(R.drawable.bg_cling2);
215                } else if (mDrawIdentifier.equals(FOLDER_PORTRAIT) ||
216                        mDrawIdentifier.equals(FOLDER_LANDSCAPE)) {
217                    mBackground = getResources().getDrawable(R.drawable.bg_cling3);
218                } else if (mDrawIdentifier.equals(FOLDER_LARGE)) {
219                    mBackground = getResources().getDrawable(R.drawable.bg_cling4);
220                } else if (mDrawIdentifier.equals(WORKSPACE_CUSTOM)) {
221                    mBackground = getResources().getDrawable(R.drawable.bg_cling5);
222                }
223            }
224            if (mBackground != null) {
225                mBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight());
226                mBackground.draw(c);
227            } else {
228                c.drawColor(0x99000000);
229            }
230
231            int cx = -1;
232            int cy = -1;
233            float scale = mRevealRadius / mPunchThroughGraphicCenterRadius;
234            int dw = (int) (scale * mPunchThroughGraphic.getIntrinsicWidth());
235            int dh = (int) (scale * mPunchThroughGraphic.getIntrinsicHeight());
236
237            // Determine where to draw the punch through graphic
238            int[] positions = getPunchThroughPositions();
239            for (int i = 0; i < positions.length; i += 2) {
240                cx = positions[i];
241                cy = positions[i + 1];
242                if (cx > -1 && cy > -1) {
243                    c.drawCircle(cx, cy, mRevealRadius, mErasePaint);
244                    mPunchThroughGraphic.setBounds(cx - dw/2, cy - dh/2, cx + dw/2, cy + dh/2);
245                    mPunchThroughGraphic.draw(c);
246                }
247            }
248
249            // Draw the hand graphic in All Apps
250            if (mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
251                mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
252                mDrawIdentifier.equals(ALLAPPS_LARGE)) {
253                if (mHandTouchGraphic == null) {
254                    mHandTouchGraphic = getResources().getDrawable(R.drawable.hand);
255                }
256                int offset = mAppIconSize / 4;
257                mHandTouchGraphic.setBounds(cx + offset, cy + offset,
258                        cx + mHandTouchGraphic.getIntrinsicWidth() + offset,
259                        cy + mHandTouchGraphic.getIntrinsicHeight() + offset);
260                mHandTouchGraphic.draw(c);
261            }
262
263            canvas.drawBitmap(b, 0, 0, null);
264            c.setBitmap(null);
265            b = null;
266        }
267
268        // Draw the rest of the cling
269        super.dispatchDraw(canvas);
270    };
271}
272